Lovely great quality mid sleeper, very sturdy and secure. Our 5 year old loves it. The colour coded sections of wood (small markings on parts of the wood that wouldn’t be seen) make it so much easier to put up. Took us an hour or so I think. 
Bit of a pain to find a mattress to fit, but ordered one from elsewhere (160x70) and this fits fine. We’re using single fitted sheets, which are a bit too big so having to tuck underneath. I think any smaller size fitted sheets may be too small (cotbed size). 
Would definitely recommend this bed!!